Damper operating mechanism



Aug. 31 1926.

W. F. ZABRISKIE DAMPER OPERATING MECHANISM Filed July 27 1925 PatentedAug. 31, 192%.

j UNITED stares senteur 1,598,188 4orifice. v

WILLIAM F. ZABRISKIEVGF DETROIT, MICHIGAN, SSIGNOR TG GABRIEL STEEL COM-PANY, OF DETRGIT, MICHIGAN, A CCSORA'ION OIE' MICHIGAN. l

Damiana ornneriiis MncHANIsi/r.

The invention relates to dampers of the type usually employed incontrolling flues of open fireplaces and the invention consists in thenovel construction of operating mechanism therefor as hereinafter setforth.

. In the drawings;

Figure lis a vertical longitudinal section through a portion of thechimney flue showing my improved damper in relation thereto.

Figure 2 is a perspective view of the damper operating mechanism.

Figure 3 is an elevation showing a slight- Vly modified construction.

Figure t isa view similar to Figure 1 showing the parts in a differentposition of adjustment.

A is a chimney flue ofthe usual construction and B is the'damper frameor box which isset into this flue. yThis box is rpreferably formedl ofysheet metal vhaving an oblique front wall C fitting beneath the masonryand terminating in the upwardly extending flange D and downwardlyextendingflange E. The rear wall F is less in height being provided withthe laterally extending iiange Gr set in the masonry and havingpivotally secured adjacent to its upper edge the dampei` H. Ihis ldampersits against the iniiig thereon completely closes the throat of thefine.

To form an operating mechanism for this damper which is positive in itsoperation both in opening and closing and which is simple andinexpensive to manufacture, I have devised the following construction;

I is a section of metal tubing of a length to extend between the frontwall C and rear wall F of the damper box. .l is a short stub shaftfitting within the end of the tube I and attached thereto preferably byelectric welding. K is a segmental cam plate which may be formed of asheet metal stamping being provided with an aperture for sleevlgagingthe tube and being plex structure. clined side flanges of the box andwhen restpoints Vfor holding the damper in lvarious positions ofadjustment. I

To assemble the operating mechanism withthedamper and frame B, thestopshaft J is inserted in `an aperture in the inner .wall F while theouter end of the tube is registered with a corresponding. aperture inthe oblique wall C. The rod O is then inserted through ali-aperture inthe'masonry which is lined with the tubular bushing P the inner end ofsaid rod telescopically ensecured by a set screw Q. This set screwengages a threaded bearing formed by a nut R which is'p'referablyelectrically. welded to the tube. By reason` of this telescopic.engagement between the rod O and tube I variations in the thickness ofthe masonry wallmay be compensated for without change in position of.the operating handle at the outer end of the rod. This handle S iswelded or other'- `wise secured .to the rod and when the said` screw Q,is tightened, will be secured Vfrom displacement.

My construction described accomplishes in la very simple mannerfunctionsqwhich are usually performed by 4a much more com- It will benoted that there are yno castings or forged parts and that all of theelements are simple in construction' and easily assembled. j y Y Forsome installations it is preferred to dispense with ,the` operatinghandle and to f provide means for adjusting the damper by a poker orsimilar tool. Thus, as shown in Figure 3, theplate K has 'attachedthereto on oneside of the shaft, a ring T through which the end of thepokermay be inserted. This will enable the operator to adjust the damperby either drawing down or pressing upward on this ring and therebyrotatably adjusting the plate. With such constructions the rod O andhandle S are dispensed with and a short stub shaft such as J is used atthe forward end of the tube I.

What I claim as my'invention is:l Y 1. Thecombination with a damperframe and a damper hinged thereto, of an operating mechanism for saiddamper comprising a tube extending between the front and rear walls ofthe damper frame, rodsengaging l j i 1,598,18s

said rods being provided with an actuating handle, asheet metal camplate mounted upon and secured to said `tube and a pin secured to saiddamper and extending into 1 operative relation to said camplate.

"2'. The combination kwith a damper frame n or box and a damper hingedthereto, of an operating mechanism for Said damper comprising a tubeextending between the front and rear walls of said frame, a pin insertedinl and secured to the rear end of said tube and having Ya projectedportion engagingan aperture in t e rear Wall of said damper box, arodpassing through the Vforward `Wall .ot 'saiddamper box andtelescopically. engaging *saidl tube, the forward. end of saidrod/'being' provided `with a handle," a set Yscrewvf for adjustablysecuring said rod to Vsaid tube,a sheet metal cam plate havinganeccentric vcam slot notched on its under side, and a npin extendinglaterally from said damper, in the vertical plane of said Y through saidcamV slot, a rodtelescopicallyy journals in the front andt rear v vallof the box,

tube, said pin'engaging said cani slot and being heldin'variouspositions of adjustment by-fth'e notched face Yof said slot.

3. The combination ivith a damper frame 0r box V'and a damper hingedthereto, of 'an operating mechanism therefor comprising a tube'extendingbetween the front and rear Walls lof said box, a sheet metal cam platesleeved on said "tube and la pin inserted the rear end of said tube eachbeing. secured bywelding, said lcam plate being lprovided vwithaneccentric cam slot notched onits under face, a pinjsecured to said.damper and vprojecting `laterally therefromf inthe 'ifeitical planeofsaidft'ube `and extending engaging said tube and` together with the pinat the .opposite end of said. tube forming 1 journal bearings inthefront and rear Walls of the box, said journal bearings forming a, handleat the outer -e'iid` ofsaid rodjand a set screvvfon 'said tube forsecuring'said-rod thereto. v K v 4. The combination with a rameor boxhaving` la 'vertically'reanvallandv an -ob- :a sheet metal Cainapertured to the sleeve on lsaid rod and Weldedr thereto, said platehaving lan eccentric cam groove notched on its under face, and a pinsecured .to said damper and projecting laterally therefrom in thevertical plane of said tube, said pin passing through said cani vslotand being adjustably. secured by the notched bearings of: said slot.

lThe combination with a damper frame and a damper hinged thereto, of anvoperative mechanism lfor said damper comprising a tube extending betweenthe front `and rear Walls-of the damper frame, rods engaging theopposite ends of said tube and extending through apertures. in saidfront and rear Wal-ls 'to form journals thereor, a sheet metal cam platemountedupon and secured to vsaid tube, a pin secured to said damperand-'extending'.into operative relation tosaid cam and a riiigsecuredtoy said cam plate on one side of said tube for engagementot 'a poker orother tooly to operate the same.

l vi 46'. The' combination with a' damper'frame anda damper hingedthereto, of anA operating member extending in a direction transverse totheaxis of the" hinge, a cam member counted on said rotary member in aplane :perpendicular to the axis thereof, said cam ki'ncrnbe'i having. acam-slot eccentric to the axis and ay pin projecting transversely fromsaid dam-per and engaging said. cam slot lwhereby the rotation of saidoperatinginemberfivill ,positively act-nate said damper. body inopeningand closing the same. l

y Intes'tifmon Wbereofr aix my si nature.

.l :ILLIAM F. ZABRI KIE

